Looks great! Do you anticipate any pushback from cloud providers, who might one day decide to restrict access to stop people getting a better price elsewhere?
When the usage gets bigger, I'm not sure how providers can restrict access anyway (curious if there are precedents). There are quite a few large multicloud platforms like Snowflake or Databricks heavily utilizing AWS/GCP/Azure already. (Granted, these platforms are not meta-cloud, in the sense of moving their customer workloads transparently across clouds.)
Ultimately we see such a system to grow the pie for the whole cloud market. The incumbents' relative shares may drop, but their absolute volume will grow.